Granted Patent
Utility
US 5,248,862 · App. 07/855,680
Gas-blast circuit breaker
Inventor:
Johannes Blatter
Patented Case
View Patent ↗
Granted: Sep 28, 1993
Filed: Mar 23, 1992
Inventor
Johannes Blatter
Assignee (at issue)
Sprecher Energie AG
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.